/*
 * Copyright � 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using NHibernate;
using NHibernate.Context;
using NHibernate.Engine;

namespace Spring.Data.NHibernate;

/// <summary>
/// Implementation of NHibernates 1.2's ICurrentSessionContext interface
/// that delegates to Spring's SessionFactoryUtils for providing a
/// Spirng-managed current Session.
/// </summary>
/// <remarks>Used by Spring's LocalSessionFactoryBean if told to expose
/// a transaction-aware SessionFactory.
/// <p>This ICurrentSessionContext implementation can also be specified in
/// custom ISessionFactory setup through the
/// "hibernate.current_session_context_class" property, with the fully
/// qualified name of this class as value.</p></remarks>
/// <author>Juergen Hoeller</author>
/// <author>Mark Pollack (.NET)</author>
/// <see cref="SessionFactoryUtils.DoGetSession(ISessionFactory, bool)"/>
public class SpringSessionContext : ICurrentSessionContext
{
    private readonly ISessionFactoryImplementor sessionFactory;

    /// <summary>
    /// Initializes a new instance of the <see cref="SpringSessionContext"/> class
    /// </summary>
    /// <param name="sessionFactory">The NHibernate session factory.</param>
    public SpringSessionContext(ISessionFactoryImplementor sessionFactory)
    {
        this.sessionFactory = sessionFactory;
    }

    /// <summary>
    /// Retrieve the Spring-managed Session for the current thread.
    /// </summary>
    /// <returns>Current session associated with the thread</returns>
    /// <exception cref="HibernateException">On errors retrieving thread bound session.</exception>
    public ISession CurrentSession()
    {
        try
        {
            return SessionFactoryUtils.DoGetSession(sessionFactory, false);
        }
        catch (InvalidOperationException ex)
        {
            throw new HibernateException(ex.Message);
        }
    }
}
